加密字节数组到图像

Question

我必须从摄像头捕获视频，对其进行加密并将其发送到服务器。 我已经使用 OpenCV 逐帧捕获。我将帧转换为字节数组并使用 AES 加密。我得到一个字节数组作为 AES 的输出。

我尝试使用 Byte Array to Image File 从加密内容（字节数组）创建图像 但是 ImageIO.read 给出了 null。原因可能是因为这个 ImageIO.read returns NULL, with no errors

如何从字节数组中创建图片（最好是jpg）？

Answer 1

假设您的客户端类发送加密的字节数组，在您的服务器类中，解密字节数组，然后从解密的字节数组重建您的图像。

ByteArrayInputStream dis = new ByteArrayInputStream(your_EncryptedBytes_array);


//Call Your decrypt method here.

ByteArrayInputStream bis = new ByteArrayInputStream(your_DecryptedBytes_array);

Iterator<?> readers = ImageIO.getImageReadersByFormatName("jpg");



/*ImageIO is a class containing static methods for locating ImageReaders
  and ImageWriters, and performing simple encoding and decoding. 
  Method  returns an Iterator containing all currently registeredImageReaders that 
  claim to be able to decode the named format */
 ImageReader reader = (ImageReader) readers.next();
        Object source = bis; 

        ImageInputStream iis = ImageIO.createImageInputStream(source); 
        reader.setInput(iis, true);
        ImageReadParam param = reader.getDefaultReadParam();

        Image image = reader.read(0, param);
        //got an image file

        BufferedImage bufferedImage = new BufferedImage(image.getWidth(null), image.getHeight(null), BufferedImage.TYPE_INT_RGB);
        //bufferedImage is the RenderedImage to be written

        Graphics2D g2 = bufferedImage.createGraphics();
        g2.drawImage(image, null, null);

        File imageFile = new File("INERT_LOCATION");
        ImageIO.write(bufferedImage, "jpg", imageFile);

        System.out.println(imageFile.getPath());